blinking particles

In attachments there's minimal code presenting the issue. For about 1 second there is observable blinking. In my project this problem is more annoying, because all the particles regardless of the application running time randomly disappear for about one frame and then reappear. Worth mentioning is the fact that in my project I managed to get rid of random blinking by switching dynamic loading of Emitters (via Loader { }) to normal loading, however in the attached minimal code the loading method doesn't matter.